Hand-screw



0'. IE. PETTINGELLQ Hand Screw.

No. 229.008. I Patented June22,1880-'.

Wrr-uzsszs. INVENTOI.

N.PEI'ERS, PHOTO-LITHOGRAPHER, WASHINGTON D C shown.

UNITED STATES PATENT OFFICE.

CHARLES F. PETTINGELL, OF SALISBURY, MASSACHUSETTS.

HAND-SCREW.

SPECIFICATION forming part of Letters Patent No. 229,008, dated June 22, 1880.

Application filed October 6, 1879.

To all whom it may concern:

Be it known that I, CHARLES F. PEITIN- GELL, of Salisbury, in the State of Massachusetts, have invented an Improved Hand- Screw, of which the following is a specification.

The object of my invention is to produce a hand-screw which can be adjusted to any point within the scope of its embrace in a much quicker manner than has heretofore been pos sible by manipulating the screws and there by moving the jaws to the required distance apart; and my invention consists in a jaw longitudinally divided, in a portion of its length, in the plane of the axis of the screws, the minor part of thejaw being hinged at its inner end to the major part, the-conjoint ends of the jaw being locked together by a springcatch adapted to rapid manipulation, such,

ends being protected by a subdivided interlocking cap, which prevents wear and abrasion by the spring and holds the halves .of the jaw in proper lateral position, the screws being both secured, by means to be described, from lineal displacement relatively to the whole jaw, and fitting into female threads in the divided jaw, the halves of which thereby constitute half-nuts, in which the male threads of the screws engage.

Figure l is a plan view of an assembled hand-screw with my improvements affixed, the whole jaw being shown in longitudinal section at the intersection of the screws. Fig. 2 is a vertical longitudinal section taken on line y z of the divided jaw, and showing the screws, cap, and catch in section. Fig. 3 is an end view of the divided jaw with the cap an d catch applied thereto. Fig. 4 is an interior view of the divided cap.

In these figures, A represents the solid jaw, and B the divided jaw, whereof E is the minor part, which is hinged to the major part by hinge a, the plate I) of which is secured to such major part, and plate 0 to the minor part.

d c are the halves of the interlocking cap, which are affixed to the parts of jaw B, as

fis the spring secured to part E by screw 1,

and having catch g, which engages part c of Instead of the interlocking of the parts of the cap as shown at m, the dowel h may be employed, as shown.

Screw O is secured in jaw A by pin i, which passes through the jaw tangentially to the bottom of' groove j, formed in the screw, as shown. Screw G is secured in its seat in jaw A by screw is, secured axially therein. Both the screws are threaded in jaw B in the usual manner, the halves of which constitute halfnuts, corresponding to the threads of the screws.

When adjusting, the jaw A is grasped by the left hand, with the screw D next the operator. The fingers of the right hand support the jaw B, and with the right thumb on catch gthe spring is thrown back, thereby releasing thejaw, when it is moved to the required distance from jaw A and again locked in place, which adjustment can, by an experienced operator, be performed in one-twelfth the time required to move the jaws together from their greatest distance apart by the usual manipulation of screws'O D.

I claim as my invention- 1. In a hand-screw having the jaws A B and screws 0 D, thejaw B, longitudinally divided in the line of the axis of such screws, with part E, hinged at one extremity and provided with a lockin g device at the other, and with corresponding screw-threads cut in such halves to engage the male threads of the screws, whereby when such locking device is disengaged the jaw itself is released from the screws, but when locked it engages the screws as a solid screw-nut, substantially asspecified.

2. In a hand-screw, the combination of the divided jaw B, hinge a, cap (1 c, and springcatch f, substantially as specified.

3. Ina hand-screw, the combination of the divided jaw B, having the parts hinged together, and provided with a locking device, the solid jaw A, and the screws 0 D, threaded in jaw B, and secured in jaw A from lineal displacement, and with free rotation, all substantially as specified.

. CHARLES F. PETTINGELL.

Witnesses:

J osErH '1. OLARKSON, WILLIAM S. CLARKSON. 

